Magnetically assisted sealing arrangement for a patient interface device

ABSTRACT

A sealing arrangement ( 20 ) for use in a patient interface device ( 18 ). The assembly includes a flexible member ( 30 ) having a sealing surface ( 30 A) structured to engage a surface of the patient at or about the airway, a first magnetic material disposed in or on the flexible member, and a second magnetic material ( 36 ) positioned in one or more of a carrier member structured to be removably positioned on, in, or about the patient, and a portion of the patient interface device. The first and second magnetic materials are positioned and structured to magnetically interact in a manner which urges the sealing surface toward the surface of the patient when the flexible member is disposed at or about the airway and the second magnetic material is disposed at a corresponding position.

CROSS-REFERENCE TO RELATED APPLICATIONS

This patent application claims the priority benefit under 35 U.S.C. §371 of international patent application no. PCT/EP2017/063412, filed onJun. 2, 2017, which claims the priority benefit under 35 U.S.C. § 119(e)of U.S. Provisional Application No. 62/350,743 filed on Jun. 16, 2016,the contents of which are herein incorporated by reference.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention pertains to a magnetically assisted sealingarrangement for a patient interface for delivering a flow of breathinggas to the airway of a patient. The present invention also pertains to acushion member for use in a patient interface device, the cushion memberhaving a sealing arrangement that is magnetically assisted. The presentinvention further pertains to an interface device for use in deliveringa flow of breathing gas to the airway of a particular patient having amagnetically assisted sealing arrangement.

2. Description of the Related Art

There are numerous situations where it is necessary or desirable todeliver a flow of breathing gas non-invasively to the airway of apatient, i.e., without intubating the patient or surgically inserting atracheal tube in their esophagus. For example, it is known to ventilatea patient using a technique known as non-invasive ventilation. It isalso known to deliver positive airway pressure (PAP) therapy to treatcertain medical disorders, the most notable of which is OSA. Known PAPtherapies include continuous positive airway pressure (CPAP), wherein aconstant positive pressure is provided to the airway of the patient inorder to splint open the patient's airway, and variable airway pressure,wherein the pressure provided to the airway of the patient is variedwith the patient's respiratory cycle. Such therapies are typicallyprovided to the patient at night while the patient is sleeping.

Non-invasive ventilation and pressure support therapies as justdescribed involve the placement of a patient interface device includinga mask component having a soft, flexible cushion on the face of apatient. The mask component may be, without limitation, a nasal maskthat covers the patient's nose, a nasal cushion having nasal prongs thatare received within the patient's nares, a nasal/oral mask that coversthe patient's nose and mouth, or a full face mask that covers thepatient's face. Such patient interface devices may also employ otherpatient contacting components, such as forehead supports, cheek pads andchin pads. The patient interface device is connected to a gas deliverytube or conduit and interfaces the ventilator or pressure support devicewith the airway of the patient, so that a flow of breathing gas can bedelivered from the pressure/flow generating device to the airway of thepatient. It is known to maintain such devices on the face of a wearer bya headgear having one or more straps adapted to fit over/around thepatient's head.

Because such masks are typically worn for an extended period of time, avariety of concerns must be taken into consideration. For example, inproviding CPAP to treat obstructive sleep apnea (OSA), the patientnormally wears the patient interface device all night long while he orshe sleeps. One concern in such a situation is that an optimum seal iscreated between the patient interface device and the patient, as anyleakage can be both undesirable to the patient and can necessitate theuse of higher treatment pressures. Another concern is that the patientinterface device is as comfortable as possible; otherwise the patientmay avoid wearing the interface device, defeating the purpose of theprescribed pressure support therapy.

A common problem with current CPAP patient interface devices is themismatch of geometry that occurs between the mask and patient's face.Such mismatch can result in leaks and patient discomfort. Therapypressure can be used to partially assist in getting the ceiling flap ofthe mask to conform to the facial geometry of the patient but at timesinternal flap forces prevent a full robust seal. Providing outside forceto assist the therapy pressure and locating and providing more force onthe mask can help to get the mask to fully seal against the patient'sface. Such outside force is commonly applied via straps. However, theapplication of such outside forces can cause the mask to be generallyuncomfortable to wear, thus leading to the patient to tend to not adhereto the proscribed therapy.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide asealing arrangement for use in a patient interface device for deliveringa flow of breathing gas to an airway of a patient. The sealingarrangement comprises a flexible member formed substantially from afirst material, the flexible member having a sealing surface structuredto sealingly engage a surface of the patient at or about the airway, theflexible member including a first magnetic material disposed in or onthe first material. The sealing arrangement further comprises a secondmagnetic material positioned in or on one or more of: a carrier memberstructured to be removably positioned on, in, or about the patient, anda portion of the patient interface device. The first magnetic materialand the second magnetic material are positioned and structured tomagnetically interact in a manner which urges the sealing surface of theflexible member toward the surface of the patient when the flexiblemember is disposed at or about the airway and the second magneticmaterial is disposed at a corresponding position to interact with thefirst magnetic material.

The first magnetic material may comprise a plurality of magneticparticles dispersed within, or provided on, the flexible member. Thefirst magnetic material may comprise at least one discrete magnetdisposed within, or provided on, the flexible member.

The flexible member may comprise a sealing flap of a cushion, thecushion may comprise a support portion underlying the sealing flap, andthe second magnetic material may be disposed in or on the supportportion such that the flexible member is urged in a direction away fromthe support portion by the magnetic interaction between the secondmagnetic material and the first magnetic material.

The second magnetic material may be disposed in the carrier member andthe carrier member may be structured to be removeably disposed in themouth of the patient. The first magnetic material may be disposed in afirst carrier member removably positioned against the flexible memberand the second magnetic material may be disposed in the carrier memberwhich comprises a second carrier member which is structured to beremoveably disposed in the mouth of the patient.

The flexible member may be a portion of a nasal pillow, the secondmagnetic material may be positioned in or on the carrier member, and thecarrier member may be structured to be positioned across the nose of thepatient.

The nasal pillow may comprise a third magnetic material positionedtherein or thereon which is positioned and structured to interact with amagnetic material of another nasal pillow in an attractive manner whenthe nasal pillow is engaged with a nare of the patient.

The third magnetic material may be positioned and structured to interactwith the first magnetic material in a repulsive manner. The flexiblemember may be a portion of a nasal pillow, the second magnetic materialmay be positioned in or on a portion of the patient interface device,and the portion of the patient interface device may comprise anothernasal pillow.

The flexible member may be a portion of a nasal pillow, the secondmagnetic material may be positioned in or on the carrier member whichcomprises a second carrier member, the second carrier member may bestructured to be positioned across the nose of the patient, and thefirst magnetic material may be positioned on or in a first carriermember which is disposed on an inner surface of the flexible member.

Another object of the present invention is to provide a cushion for usein a patient interface device for delivering a flow of breathing gas toan airway of a patient. The cushion includes a sealing arrangement aspreviously described. A further object of the present invention is toprovide a patient interface device for delivering a flow of breathinggas to an airway of a patient. The patient interface device includes acushion having a sealing arrangement as previously described.

These and other objects, features, and characteristics of the presentinvention, as well as the methods of operation and functions of therelated elements of structure and the combination of parts and economiesof manufacture, will become more apparent upon consideration of thefollowing description and the appended claims with reference to theaccompanying drawings, all of which form a part of this specification,wherein like reference numerals designate corresponding parts in thevarious figures. It is to be expressly understood, however, that thedrawings are for the purpose of illustration and description only andare not intended as a definition of the limits of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front isometric view of a patient interface device and aportion of a conduit shown connected to a gas flow/pressure generatingsystem (shown schematically) to form a system adapted to provide aregiment of respiratory therapy to a patient according to one exemplaryembodiment of the invention;

FIG. 2 is a partially schematic sectional view of a patient interfacedevice according to an exemplary embodiment of the invention;

FIG. 2A is a detailed view of the portion of the patient interfacedevice indicated at 2A in FIG. 2;

FIG. 3 is a partially schematic sectional view of a patient interfacedevice according to another exemplary embodiment of the invention showndisposed on the face of a patient;

FIG. 3A is a detailed view of the portion of the patient interfacedevice of FIG. 3 indicated at 3A in FIG. 3;

FIGS. 3B-3D are isometric views of example embodiments of carriermembers according to the present invention which may be employed in thepatient interface device of FIG. 3;

FIG. 4 is a partially schematic sectional view of yet another patientinterface device according to an exemplary embodiment of the inventionshown disposed on the face of a patient;

FIG. 4A is a detailed view of the portion of the patient interfacedevice of FIG. 4 indicated at 4A in FIG. 4;

FIGS. 4B-4C are isometric views of example embodiments of carriermembers according to the present invention which may be employed in thepatient interface device of FIG. 4;

FIG. 5 is a partially schematic isometric view of yet another patientinterface device according to an exemplary embodiment of the invention;

FIG. 5A is a front elevation view of the patient interface device ofFIG. 5 shown disposed on the face of a patient;

FIG. 5B is a sectional view of the arrangement of FIG. 5A viewed in aplane generally parallel to the facial plane of the patient showingdetails of the engagement between portions of the patient interface andcorresponding surfaces of the nasal structure of the patient;

FIG. 6 is a partially schematic isometric view of yet another patientinterface device according to an exemplary embodiment of the invention;

FIG. 6A is a sectional view of the arrangement of FIG. 6 disposed incontact with the nostrils of a patient, viewed in a plane disposedgenerally parallel to the facial plane of the patient showing details ofthe engagement between portions of the patient interface andcorresponding surfaces of the nasal structure of the patient;

FIG. 7 is a partially schematic isometric view of yet another patientinterface device according to an exemplary embodiment of the invention;

FIG. 7A is a sectional view of the arrangement of FIG. 7 disposed incontact with the nostrils of a patient, viewed in a plane disposedgenerally perpendicular to the facial plane of the patient showingdetails of the engagement between portions of the patient interface andcorresponding surfaces of the nasal structure of the patient;

FIG. 8 is an isometric view of a portion of a patient interface deviceaccording to an exemplary embodiment of the invention; and

FIG. 8A is a sectional view of the portion of the patient interfacedevice of FIG. 8 taken along line A-A of FIG. 8.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

As used herein, the singular form of “a”, “an”, and “the” include pluralreferences unless the context clearly dictates otherwise. As usedherein, the statement that two or more parts or components are “coupled”shall mean that the parts are joined or operate together either directlyor indirectly, i.e., through one or more intermediate parts orcomponents, so long as a link occurs. As used herein, “directly coupled”means that two elements are directly in contact with each other. As usedherein, “fixedly coupled” or “fixed” means that two components arecoupled so as to move as one while maintaining a constant orientationrelative to each other.

As used herein, the word “unitary” means a component is created as asingle piece or unit. That is, a component that includes pieces that arecreated separately and then coupled together as a unit is not a“unitary” component or body. As employed herein, the statement that twoor more parts or components “engage” one another shall mean that theparts exert a force against one another either directly or through oneor more intermediate parts or components. As employed herein, the term“number” shall mean one or an integer greater than one (i.e., aplurality).

As used herein, the word “patient” or “user” shall be usedinterchangeably to refer to the person to which the interface device isdelivering a flow of breathing gas.

As used herein, the phrase “removably positioned” shall be used to referto an element which may be placed on a surface of, in an orifice (i.e.,mouth, nostril), or about a user, and subsequently removed therefrom,without the use of any tools. In contrast, an element which is disposedwithin tissue, e.g., via surgically implantation, is not “removablypositioned” as used herein.

As used herein, the phrase “on a user” shall mean an element is disposedgenerally against an external surface of a user.

As used herein, the phrase “in a user” shall mean an element is disposedwithin an orifice (i.e., mouth, nostril(s)) of a user. An element whichis implanted within tissue (i.e., not just placed on the surface oftissue) such as via surgical or other means is not considered to be “ina user” as such phrase is used herein.

As used herein, the phrase “sealingly engage” shall mean elements whichcontact each other in a manner such that a generally air-tight seal isformed therebetween.

As used herein in arrangements in which attractive forces are utilized,a “first magnetic material” and a “second magnetic material” include amaterial that is attracted to iron or steel, e.g., a typical magnet, anda material such as iron, steel, or another magnet to which the firstmaterial is attracted. It is understood that the purpose of the “firstmagnetic material” and the “second magnetic material” in sucharrangements is to have the two materials magnetically attracted to eachother. Thus, two non-magnetized materials, e.g. two pieces of normalsteel, are not a “first magnetic material” and a “second magneticmaterial” in such arrangements.

As used herein in arrangements in which repulsive forces are utilized, a“first magnetic material” and a “second magnetic material” include amaterial that is attracted to iron or steel, e.g., a typical magnet, anda second material that is repelled from the first material, e.g., asecond magnet arranged with a common pole facing the first magnet. It isunderstood that the purpose of the “first magnetic material” and the“second magnetic material” in such arrangements is to have the twomaterials magnetically repelled away from each other. Thus, a magnetizedmaterial and a non-magnetized materials, e.g. a magnet and a piece ofnormal steel, are not a “first magnetic material” and a “second magneticmaterial” in such arrangements.

As used herein, two or more elements which interact in an “attractivemanner” are generally drawn toward each other via magnetic forces (e.g.,without limitation, two magnets which are arranged having opposing poles(i.e., N-S, S-N) facing each other).

As used herein, two or more elements which interact in a “repulsivemanner” are generally repelled away from each other via magnetic forces(e.g., without limitation, two magnets which are arranged having thesame poles (i.e., N-N, S-S) facing each other).

Directional phrases used herein, such as, for example and withoutlimitation, top, bottom, left, right, upper, lower, front, back, andderivatives thereof, relate to the orientation of the elements shown inthe drawings and are not limiting upon the claims unless expresslyrecited therein.

A system 2 adapted to provide a regimen of respiratory therapy to apatient according to one exemplary embodiment of the invention isgenerally shown in FIG. 1. System 2 includes a pressure generatingdevice 4 (shown schematically), a delivery conduit 6 (shown partiallyschematically), and a patient interface device 8 having a fluid couplingconduit 10 coupled thereto. Pressure generating device 4 is structuredto generate a flow of breathing gas and may include, without limitation,ventilators, constant pressure support devices (such as a continuouspositive airway pressure device, or CPAP device), variable pressuredevices (e.g., BiPAP®, Bi-Flex®, or C-Flex™ devices manufactured anddistributed by Philips Respironics of Murrysville, Pa.), andauto-titration pressure support devices. Delivery conduit 6 isstructured to communicate the flow of breathing gas from pressuregenerating device 4 to patient interface device 8 through fluid couplingconduit 10, which in the illustrated embodiment is an elbow connector.Delivery conduit 6 and user interface device 8 are often collectivelyreferred to as a patient circuit.

A BiPAP® device is a bi-level device in which the pressure provided tothe patient varies with the patient's respiratory cycle, so that ahigher pressure is delivered during inspiration than during expiration.An auto-titration pressure support system is a system in which thepressure varies with the condition of the patient, such as whether thepatient is snoring or experiencing an apnea or hypopnea. For presentpurposes, pressure/flow generating device 4 is also referred to as a gasflow generating device, because flow results when a pressure gradient isgenerated. The present invention contemplates that pressure/flowgenerating device 4 is any conventional system for delivering a flow ofgas to an airway of a patient or for elevating a pressure of gas at anairway of the patient, including the pressure support systems summarizedabove and non-invasive ventilation systems.

In the exemplary embodiment illustrated in FIG. 1, patient interfacedevice 8 is depicted as a nasal mask which includes a user sealingassembly or cushion 12 coupled to a generally rigid frame 14 which iscoupled to conduit 6 via fluid coupling conduit 10. However, it is to beappreciated that other types of patient interface devices, such as,without limitation, a nasal pillows mask, an oral mask, a nasal/oralmask, or a full/total face mask (which encompasses the entire face),which facilitates the delivery of the flow of breathing gas to theairway of a user, may be substituted for patient interface device 8while remaining within the scope of the present invention. It is also tobe appreciated that conduit 6 may be directly coupled to patientinterface device 8 without the use of any intermediary coupling, such asconduit 10. Patient interface device 8 may be secured to the head of apatient via a suitable headgear 16, which is also shown for exemplarypurposes only.

Referring now to FIG. 2, a partially schematic sectional view of anexample embodiment of a patient interface device 18 including a sealingarrangement 20 in accordance with the present invention is shown.Similar to patient interface device 8, patient interface device 18includes a user sealing assembly or cushion 22 which is coupled to agenerally rigid frame 24. Cushion 22 is generally formed from aconformable material (e.g., without limitation, silicone, TPE(ThermoPlastic Elastomer), vinyl, elastomeric material, foam, fabric,latex rubber). Cushion 22 includes a first end 26 coupled to frame 24and an opposite second end 28 which includes sealing arrangement 20which is structured to sealingly engage a surface of a patient (notshown) at or about an airway of the patient. More particularly, sealingarrangement 20 includes a flexible member in the form of a sealing flap30 having a sealing surface 30A which, in the example shown in FIG. 2,is structured to sealingly engage a patient's face about the mouth of apatient. Although FIG. 2 shows an example of an oral mask (i.e., onethat only covers the mouth of a patient), it is to be appreciated,however, that the general concept described herein with regard to thearrangement shown in FIG. 2 may also be readily applied to otherinterface arrangements (i.e., nasal masks, oral/nasal masks, full/totalface masks).

Continuing to refer to FIG. 2, sealing arrangement 20 further includesone or more support portions 32 which are positioned to generallyunderlie sealing flap 30 and structured to physically urge sealing flap30 toward the face of a user when frame 24 is urged toward the face of auser via a headgear strap 33 or other suitable arrangement. Sealing flap30 and support portions 32 are integrally formed portions of cushion 22which, as previously discussed, is formed from a conformable material.However, as shown partially schematically in FIG. 2A, sealing flap 30further includes a first magnetic material 34 (shown schematically)which is positioned therein or thereon in a predetermined manner tointeract with a second magnetic material 36 (shown schematically), whichis positioned in or on support portion 32. More particularly, firstmagnetic material 34 and second magnetic material 36 have theirrespective magnetic poles oriented such that first magnetic material 34is repelled by second magnetic material 36. As frame 24, and thussupport portion 32 and second magnetic material 36, are urged toward theface of the patient via strap 33, sealing flap 30 (and sealing surface30A thereof) is also further urged toward the face of the patient by therepulsive magnetic force(s) F resulting from the interaction of themagnetic fields produced by first magnetic material 34 and secondmagnetic material 36.

First magnetic material 34 may be arranged as a plurality of smallmagnetic particles dispersed within, or as a coating provided on,sealing flap 30. For example, the material may be added as a magneticpowder from pulverized magnets. The powder may be added to uncuredsilicone and injection molded in sealing flap 30. To orient the poles ofthe magnetic particles in the desired orientation, the tool couldinclude magnets inserted in the orientation that would attract a certainpole of each magnet. As the material surrounding the magnetic particlescures, the magnetic particles are effectively locked in position. Asanother example, magnetic material 34 could be in the form of a thinmagnetic material that was already magnetized then reformed to createsealing flap 30. As yet another example, iron particles can beincorporated into the cushion via compounding and then formed into asealing flap. After formation, the material in the flap can bemagnetized similarly to the way magnets are created today through aninduced electrical magnetic field. First magnetic material 34 may alsotake the form of one or more discrete preformed magnets (e.g., withoutlimitation, cylindrical magnets) which are disposed within, or providedon, sealing flap 30 (e.g., without limitation, such magnets could beovermolded or glued in place with the assistance of a suitable jig.

Similarly, second magnetic material 36 may be arranged as a plurality ofsmall magnetic particles dispersed within, or as a coating provided on,support portion 32. Alternatively, second magnetic material 36 may takethe form of one or more discrete preformed magnets which are disposedwithin, or provided on, support portion 32. Although shown as beingplaced in locations which would lie generally above and below the mouthof a patient, it is to be appreciated that such magnetically interactingportions (i.e., first magnetic material 34 and second magnetic material36) may be located in sealing arrangement 20 generally anywhere alongthe opening of the patient's mouth as desired to provide an improvedseal in such areas.

In another example embodiments in accordance with the present invention,one or both of first magnetic material 34 and/or second magneticmaterial 36 may be provided as a part of a kit which includes othermaterials (e.g., without limitations, a suitable adhesive) for customplacing one or both of magnetic materials 34 and/or 36 on a cushion as asort of retrofit application.

Referring now to FIGS. 3 and 3A, a partially schematic sectional view ofanother example embodiment of a patient interface device 38 including asealing arrangement 40 in accordance with the present invention is showndisposed in contact with the face of a patient. Patient interface device38 includes a user sealing assembly or cushion 42 which is coupled to agenerally rigid frame 44. Cushion 42 is generally formed from aconformable material (e.g., without limitation, silicone, TPE, vinyl,elastomeric material, foam, fabric, latex rubber). Cushion 42 includes afirst end 46 coupled to frame 44 and an opposite second end 48 (whichincludes part of sealing arrangement 40) which is structured tosealingly engage a surface of a patient (shown schematic in section, notnumbered) at or about an airway of the patient.

More particularly, sealing arrangement 40 includes a sealing flap 50having a sealing surface 50A which, in the example shown in FIG. 3, isstructured to sealingly engage a patient's face about the mouth of apatient. Sealing flap 50 is integrally formed as a portion of cushion 42and as such is also formed from a conformable material. However, asshown partially schematically in FIG. 3A, sealing flap 50 furtherincludes a first magnetic material 54 which is positioned therein orthereon in a predetermined manner to magnetically interact in anattractive manner with a second magnetic material 56, which ispositioned in or on a carrier member 52 that is removably positioned inthe mouth of the patient (i.e., in the patient) generally between thelip and gums/teeth of the patient, generally opposite first magneticmaterial 54.

FIGS. 3B-3D show some example embodiments of carrier members 52, 52′,52″ which may be used in sealing arrangement 40 of FIG. 3. For example,FIG. 3B shows a carrier member 52 formed from a first material 58 (e.g.,without limitation, silicone, TPE, vinyl, elastomeric material, foam,fabric, latex rubber, plastic) having second magnetic material 56disposed both in upper and lower portions thereof. Carrier member 52includes a breathing passage 60 formed therethrough which is ofsufficient size to generally not obstruct the passage of breathing gasto the airway of the patient. Carrier member 52′ of FIG. 3C is ofgenerally similar construction as carrier member 52 except carriermember 52′ does not include any portions connecting the upper and lowerportions thereof.

Carrier member 52″ of FIG. 3D is formed in a similar shape as anathletic mouthpiece or mouthguard and as such includes upper and lowerchannels (only upper channel 62 is visible in FIG. E) which are eachstructured to be engaged by either the upper or lower teeth of a user.Similar to carrier member 52 of FIG. 3, carrier member 52″ also includesa breathing passage 60 formed therethrough which is of sufficient sizeto not obstruct the passage of breathing gas to the airway of thepatient. It is to be appreciated that each of such carrier members 52,52′, 52″ are arranged so as to position second magnetic material 56 in amanner such that first magnetic material 54 of sealing flap 50 isattracted thereto, and thus sealing flap 50 and sealing surface 50Athereof is urged toward the face of the patient (such as shown by arrowsF in FIG. 3).

First magnetic material 54 may be arranged as a plurality of smallmagnetic particles dispersed within, or provided on, sealing flap 50(e.g., such as described elsewhere herein). Alternatively, firstmagnetic material 54 may take the form of one or more discrete preformedmagnets (e.g., such as described elsewhere herein) which are disposedwithin, or provided on, sealing flap 50. Similarly, second magneticmaterial 56 may be arranged as a plurality of small magnetic particlesdispersed within, or as a coating provided on, carrier member 52 (suchas described elsewhere herein). Alternatively, second magnetic material56 may take the form of one or more discrete preformed magnets which aredisposed within, or provided on, carrier member 52 (e.g., such asdescribed elsewhere herein). Although shown as being placed in locationswhich would lie generally above and below the mouth of a patient, it isto be appreciated that such magnetically interacting portions (i.e.,first magnetic material 54 and second magnetic material 56) may belocated in sealing arrangement 40 generally anywhere along the openingof the patient's mouth as desired to provide an improved seal in suchareas.

Although FIG. 3 shows an example of an oral mask (i.e., one that onlycovers the mouth of a patient), it is to be appreciated, however, thatthe general concept described herein with regard to the arrangementshown in FIG. 3 may also be readily applied to other interfacearrangements (i.e., nasal masks, oral/nasal masks, full/total facemasks). It is also to be appreciated that the arrangement shown in FIG.3 may be used in conjunction with a suitable headgear arrangement or, inapplications where sufficient magnetic forces are created between firstmagnetic material 54 an second magnetic material 56, without a headgeararrangement.

Referring now to FIGS. 4 and 4A, a partially schematic sectional view ofyet another example embodiment of a patient interface device 68including a sealing arrangement 70 in accordance with the presentinvention disposed in contact with the face of a patient is shown.Patient interface device 68 includes a user sealing assembly or cushion72 which is coupled to a generally rigid frame 74. Cushion 72 isgenerally formed from a conformable material (e.g., without limitation,silicone, TPE, vinyl, elastomeric material, foam, fabric, latex rubber).Cushion 72 includes a first end 76 coupled to frame 74 and an oppositesecond end 78 (which includes part of sealing arrangement 70) which isstructured to sealingly engage a surface of a patient (shown schematicin section, not numbered) at or about an airway of the patient. Moreparticularly, sealing arrangement 70 includes a sealing flap 80 having asealing surface 80A which, in the example shown in FIG. 4, is structuredto sealingly engage a patient's face about the mouth of a patient.Sealing flap 80 is integrally formed as a portion of cushion 72 and assuch is also formed from conformable first material 71.

Continuing to refer to FIGS. 4 and 4A, as well as to FIG. 4B, sealingarrangement 70 further includes a first carrier member 90 removablypositioned within cushion 72 against (i.e., on) an inner surface (notnumbered) of sealing flap 80 opposite sealing surface 80A. First carriermember 90 includes a breathing passage 94 formed therethrough which isof sufficient size to not obstruct the passage of breathing gas to theairway of the patient. First carrier member 90 is formed from aconformable material (e.g., such as described elsewhere herein) having afirst magnetic material 84 disposed both in or on upper and lowerportions thereof. In another example embodiment, such as illustrated inFIG. 4C, an alternative first carrier member 90′ may be formed from twosub-portions 90A′, 90B′, each having first magnetic material 84 disposedtherein or thereon. First magnetic material 84 is positioned in or onfirst carrier member 90 in a predetermined position to magneticallyinteract in an attractive manner with a second magnetic material, suchas second magnetic material 56, which is positioned in a second carriermember, such as any of the example carrier members 52, 52′, 52″previously described in conjunction with FIGS. 3B-3D, that is removablypositioned in the mouth of the patient (i.e., in the patient generallybetween the lip and gums/teeth) generally opposite first magneticmaterial 84.

First magnetic material 84 may be arranged as a plurality of smallmagnetic particles dispersed within, or provided on, first carriermember 90. Alternatively, first magnetic material 84 may take the formof one or more discrete preformed magnets (e.g., such as describedelsewhere herein) which are disposed within, or provided on, firstcarrier member 90. Second magnetic material 56 may be arranged relativeto carrier member 52 in any of the manners previously discussed.Although shown as being placed in locations which would lie generallyabove and below the mouth of a patient, it is to be appreciated thatsuch magnetically interacting portions (i.e., first magnetic material 84and second magnetic material 56) may be located in sealing arrangement70 generally anywhere along the opening of the patient's mouth asdesired to provide an improved seal in such areas.

Although FIG. 4 shows an example of an oral mask (i.e., one that onlycovers the mouth of a patient), it is to be appreciated, however, thatthe general concept described herein with regard to the arrangementshown in FIG. 4 may also be readily applied to other interfacearrangements. It is also to be appreciated that the arrangement shown inFIG. 4 may be used in conjunction with a suitable headgear arrangementor, in applications where sufficient magnetic forces are created betweenfirst magnetic material 84 an second magnetic material 56, without aheadgear arrangement.

Referring now to FIGS. 5 and 5A, a partially schematic isometric view ofanother example embodiment of a patient interface device 108 in the formof a nasal pillows mask having a sealing arrangement 110 in accordancewith the present invention is shown by itself (FIG. 5) and disposed incontact with the face of a patient (FIG. 5A). Patient interface device108 includes a user sealing assembly or cushion 112 having a supplyaperture 114 which is adapted to be coupled to a conduit or othersuitable member for providing a supply of treatment gas therein. Cushion112 is generally formed from a conformable material (e.g., withoutlimitation, silicone, TPE, vinyl, elastomeric material, foam, fabric,latex rubber). Cushion 112 generally includes a first end 116 havingsupply aperture 114 disposed therein or about, and an opposite secondend 118 having a pair of nasal pillows 120 which are each structured tosealingly engage a surface of a patient (shown schematically, notnumbered) at or about an airway of the patient. More particularly, eachnasal pillow 120 includes a sealing flap 122 having a sealing surface122A which is structured to sealingly engage a patient's face/nose abouta nostril of a patient. Sealing flap 122 is formed from a conformablematerial (e.g., such as described elsewhere herein) and may be formedseparately from, or integrally with, cushion 112.

Continuing to refer to FIGS. 5 and 5A, as well as to FIG. 5B (whichshows a sectional view of the arrangement of FIG. 5A in a planegenerally parallel to the facial plane of the patient), sealing flap 122further includes a first magnetic material 124 (shown schematically)which is positioned therein in a predetermined manner to magneticallyinteract in an attractive manner with a second magnetic material 126(shown schematically), which is positioned in a carrier member 130 thatis removably positioned on the nose of the patient generally spanningacross the nose and disposed slightly upward from the nostrils of thepatient. Carrier member 130 is positioned such that second magneticmaterial 126 is thus disposed generally opposite first magnetic material124 such that second magnetic material 126 and first magnetic material124 magnetically interact in an attractive manner. Such attractivemagnetic interaction acts to urge sealing surface 122A of sealing flap122 toward the surface of the patient, thus improving the seal betweensealing flap 122 and generally the alar rim of the patient's nose.

First magnetic material 124 may be arranged as a plurality of smallmagnetic particles dispersed within, or provided on, sealing flap 122.Alternatively, first magnetic material 124 may take the form of one ormore discrete preformed magnets (e.g., such as described elsewhereherein) which are disposed within, or provided on, sealing flap 122.Second magnetic material 126 may be arranged relative to carrier member130 in any of the manners previously discussed.

Referring now to FIGS. 6 and 6A, a partially schematic isometric view ofanother example embodiment of a patient interface device 138 in the formof a nasal pillows mask having a sealing arrangement 140 in accordancewith the present invention is shown by itself (FIG. 6) and in a sectionview (FIG. 6A) showing device 138 disposed in contact with the nose of apatient in a plane parallel to a facial plane of the patient. Patientinterface device 138 includes a user sealing assembly or cushion 142having a supply aperture 144 which is adapted to be coupled to a conduitor other suitable member for providing a supply of treatment gastherein. Cushion 142 is generally formed from a conformable material(e.g., without limitation, silicone, TPE, vinyl, elastomeric material,foam, fabric, latex rubber). Cushion 142 generally includes a first end146 having supply aperture 134 disposed therein or about, and anopposite second end 148 having a pair of nasal pillows 150 which areeach structured to sealingly engage a surface of a patient (shownschematically in partial dashed line, not numbered) at or about anairway of the patient. More particularly, each nasal pillow 150 includesa sealing flap 152 having a sealing surface 152A which is structured tosealingly engage a patient's face/nose about a nostril of a patient.Each sealing flap 152 is formed from a conformable material the same as,or similar to, cushion 142 and may be formed separately from, orintegrally with, cushion 142.

Continuing to refer to FIGS. 6 and 6A, each sealing flap 152 furtherincludes a magnetic material 154 (shown schematically) which ispositioned therein in a predetermined manner to magnetically interact inan attractive manner with the magnetic material 152 of the other sealingflap 152. Hence, in the example shown in FIG. 6A, such magneticattraction between the magnetic material 154 of each sealing flap 152urges sealing surfaces 152A toward each other, thus improving the sealbetween each sealing flap 152 and the nasal septum of the patient.

Magnetic material 154 may be arranged as a plurality of small magneticparticles dispersed within, or provided on, sealing flap 152.Alternatively, magnetic material 154 may take the form of one or morediscrete preformed magnets (e.g., such as described elsewhere herein)which are disposed within, or provided on, sealing flap 152.

Referring now to FIGS. 7 and 7A, a partially schematic isometric view ofanother example embodiment of a patient interface device 158 in the formof a nasal pillows mask having a sealing arrangement 160 in accordancewith the present invention is shown by itself (FIG. 7) and in a sectionview (FIG. 7A) showing device 158 disposed in contact with the nose of apatient in a plane perpendicular to a facial plane of the patient.Patient interface device 158 includes a user sealing assembly or cushion162 having a supply aperture 164 which is adapted to be coupled to aconduit or other suitable member for providing a supply of treatment gastherein. Cushion 162 is generally formed from a conformable material(e.g., without limitation, silicone, TPE, vinyl, elastomeric material,foam, fabric, latex rubber). Cushion 162 includes a pair of nasalpillows 170 which are each structured to sealingly engage a surface of apatient (shown schematically in partial dashed line, not numbered) at orabout an airway of the patient. More particularly, each nasal pillow 170includes a sealing flap 172 having a sealing surface 172A which isstructured to sealingly engage a patient's face/nose about a nostril ofa patient. Sealing flap 172 is formed from a conformable material thesame as, or generally similar to cushion 162 and may be formedseparately from, or integrally with, cushion 162.

Sealing flap 172 includes a first magnetic material 174 (shownschematically) which is positioned therein in a predetermined manner tomagnetically interact in an attractive manner with a second magneticmaterial 176 (shown schematically), which is positioned in a carriermember 180 that is removably positioned on the nose of the patientgenerally spanning across the nose and disposed slightly upward from thenostrils of the patient. Carrier member 180 is positioned such thatsecond magnetic material 176 is thus disposed generally opposite firstmagnetic material 174 such that second magnetic material 176 and firstmagnetic material 174 magnetically interact in an attractive manner Suchattractive magnetic interaction acts to urge sealing surface 172A ofsealing flap 172 toward the surface of the patient, thus improving theseal between sealing flap 172 and generally the alar rim of thepatient's nose.

Continuing to refer to FIGS. 7 and 7A, each sealing flap 172 furtherincludes a third magnetic material 182 (shown schematically) which ispositioned therein in a predetermined manner to magnetically interact inan attractive manner with the magnetic material 182 of the other sealingflap 172 as well as to magnetically interact in a repulsive manner withthe magnetic material 174 of the same sealing flap 172. Hence, in theexample shown in FIG. 7A, the magnetic attraction between magneticmaterial 182 of each sealing flap 172 urges sealing surfaces 172A ofeach sealing flap 172 toward each other, thus improving the seal betweeneach sealing flap 172 and the nasal septum of the patient. At the sametime, the magnetic repulsion between magnetic material 174 and magneticmaterial 182 of the same sealing flap 172 helps to keep each nasalpillow 170 open.

Each magnetic material 174 and 182 may be arranged as a plurality ofsmall magnetic particles dispersed within, or provided on, sealing flap172. Alternatively, magnetic materials 174 and 182 may take the form ofone or more discrete preformed magnets (e.g., such as describedelsewhere herein) which are disposed within, or provided on, sealingflap 182. Magnetic material 176 may be arranged relative to carriermember 180 in any of the manners previously discussed.

Referring now to FIG. 8, a single pillow 190 of a patient interfacedevice in accordance with an example embodiment of the present inventionis shown. Pillow 190 is of similar construction as the pillow memberspreviously described herein and thus includes a sealing flap 192.However, unlike the other pillows members described herein, pillowmember 190 does not include any magnetic material disposed therein.Instead, magnetic material 196, 198 is disposed in a carrier member 194which is disposed on an inner surface of sealing flap 192. Carriermember 194 is formed from a conformable material (e.g., such asdescribed elsewhere herein) which may be readily positioned in, orremoved from, pillow 190.

In the claims, any reference signs placed between parentheses shall notbe construed as limiting the claim. The word “comprising” or “including”does not exclude the presence of elements or steps other than thoselisted in a claim. In a device claim enumerating several means, severalof these means may be embodied by one and the same item of hardware. Theword “a” or “an” preceding an element does not exclude the presence of aplurality of such elements. In any device claim enumerating severalmeans, several of these means may be embodied by one and the same itemof hardware. The mere fact that certain elements are recited in mutuallydifferent dependent claims does not indicate that these elements cannotbe used in combination.

Although the invention has been described in detail for the purpose ofillustration based on what is currently considered to be the mostpractical and preferred embodiments, it is to be understood that suchdetail is solely for that purpose and that the invention is not limitedto the disclosed embodiments, but, on the contrary, is intended to covermodifications and equivalent arrangements that are within the spirit andscope of the appended claims. For example, it is to be understood thatthe present invention contemplates that, to the extent possible, one ormore features of any embodiment can be combined with one or morefeatures of any other embodiment.

What is claimed is:
 1. A sealing arrangement for use in a patientinterface device for delivering a flow of breathing gas to an airway ofa patient, the sealing arrangement comprising: (a) a flexible memberhaving a sealing surface structured configured to sealingly engage thepatient at or about the airway, the flexible member including a firstmagnetic material disposed therein or thereon; and (b) a second magneticmaterial positioned in or on an inward extending support portion of acushion of the patient interface device, wherein the flexible member isa sealing flap of the cushion, wherein the first magnetic material andthe second magnetic material are positioned and structured tomagnetically interact in a manner which urges the sealing surface of theflexible member toward the surface of the patient when the flexiblemember is disposed at or about the airway and the second magneticmaterial is disposed at a corresponding position to interact with thefirst magnetic material, wherein the inward extending support portionextends inward from an interior surface of the sealing arrangement andwherein the sealing flap is configured to contact an external skinsurface of the patient's face when the patient interface device is in ause position.
 2. The sealing arrangement of claim 1, wherein the firstmagnetic material comprises a plurality of magnetic particles dispersedwithin, or provided on, the flexible member.
 3. The sealing arrangementof claim 1, wherein the first magnetic material comprises at least onediscrete magnet disposed within, or provided on, the flexible member.